177 citations · 2.4k across the 68 of their papers we have counts for
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Helicity effect on turbulent passive and active scalar diffusivities
Axel Brandenburg, Petri J. Käpylä, Igor Rogachevskii +1
Turbulent flows are known to produce enhanced effective magnetic and passive scalar diffusivities, which can fairly accurately be determined with numerical methods. It is now known…
Turbulent Prandtl number from isotropically forced turbulence
Petri J. Käpylä, Nishant K. Singh
Turbulent motions enhance the diffusion of large-scale flows and temperature gradients. Such diffusion is often parameterized by coefficients of turbulent viscosity () a…
Reynolds number dependence of Lyapunov exponents of turbulence and fluid particles
Itzhak Fouxon, Joshua Feinberg, Petri Käpylä +1
The Navier-Stokes equations generate an infinite set of generalized Lyapunov exponents defined by different ways of measuring the distance between exponentially diverging perturbed…